Control system imposing automatic mode absent driver manual shift request
First Claim
1. A control system for a semi-automatic gearbox, including a lever for controlling gear changes, control means for controlling an automatic operating mode for changing gear ratios in the gearbox, wherein the control means include a control button available to the driver on said lever for initiating an automatic operating mode, and for initiating a change over from automatic mode to manual mode, and wherein said system further includes a subassembly having means for analyzing the actuation of the lever representing the requests made by the driver and for imposing an automatic operating mode when it no longer recognizes the requests made by the driver, as expressed by actuating the lever.
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Accused Products
Abstract
The present invention relates to a semi-automatic gearbox system, characterized by the fact that it includes control means suitable for controlling an automatic or semi-automatic operating mode for changing gear ratios in the gearbox. When actuated by the driver, the gear lever transmits the driver'"'"'s request to the computer, via the sensors. After analyzing the legitimacy of the driver'"'"'s request, the module proceeds to change the gear as requested. The module controls the electrically driven valves for controlling the clutch, and gear selection and engagement, and establishes dialog with the engine control computer for appropriately managing the engine torque and the engine speed during the gear change. The commands are confirmed by the position sensors on the actuators, and by the sensors for sensing the engine speed, and the inlet speed and the outlet speed of the gearbox. The absolute gear ratio engaged in the gearbox is displayed on the display.
14 Citations
27 Claims
- 1. A control system for a semi-automatic gearbox, including a lever for controlling gear changes, control means for controlling an automatic operating mode for changing gear ratios in the gearbox, wherein the control means include a control button available to the driver on said lever for initiating an automatic operating mode, and for initiating a change over from automatic mode to manual mode, and wherein said system further includes a subassembly having means for analyzing the actuation of the lever representing the requests made by the driver and for imposing an automatic operating mode when it no longer recognizes the requests made by the driver, as expressed by actuating the lever.
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20. A control system for a semi-automatic gearbox, including a lever for controlling gear changes, control means for controlling an automatic operating mode for changing gear rations in the gearbox, wherein the control means include a control button available to the driver on said lever for initiating an automatic operating mode, wherein said system further includes a change over from automatic mode to manual mode, wherein said system further includes a subassembly comprising means for analyzing the actuation of the lever representing the requests made by the driver and for imposing an automatic operating mode when it no longer recognizes the requests made by the driver, as expressed by actuating the lever, and wherein said system further includes means, for maintaining the system in automatic mode, when the vehicle is stationary, or while parking maneuvers are being performed from such a stationary position, in spite of any intervention by the driver on the lever to select a forward gear or a reverse gear.
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21. A control system for a semi-automatic gearbox, including a lever for controlling gear changes, control means for controlling an automatic operating mode for changing gear ratios in the gearbox, wherein the control means include a control button available to the driver on said lever for initiating an automatic operating mode, and for initiating a change over from automatic mode to manual mode, wherein said system further includes a subassembly comprising means for analyzing the actuation of the lever representing the requests made by the driver and for imposing an automatic operating mode when it no longer recognizes the requests made by the driver as expressed by actuating the lever, said subassembly further imposing a degraded operating mode limiting the authorizations for gear changes.
- 22. A control system for a semi-automatic gearbox, including a lever for controlling gear changes, control means for controlling an automatic operating mode for changing gear ratios in the gearbox, wherein the control means include a control button available to the driver on said lever for initiating an automatic operation mode, and for initiating a change over from automatic mode to manual mode, wherein said system further includes a subassembly comprising means for analyzing the actuation of the lever representing the requests made by the driver and for imposing an automatic operating mode when it no longer recognizes the requests made by the driver, as expressed by actuating the lever, and wherein said system further includes means for causing first gear to be engaged automatically when the system detects that the vehicle has stopped, with the engine running, and with a gear ratio other than neutral or than reverse.
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25. A control system for a semi-automatic gearbox, including a lever for controlling gear changes, control means for controlling an automatic operating mode for changing gear ratios in the gearbox, wherein the control means include a control button available to the driver on said lever for initiating an operating mode, and for initiating a change over from automatic mode to manual mode, wherein said system further includes a subassembly comprising means for analyzing the actuation of the lever representing the requests made by the driver and for imposing an automatic operating mode when it no longer recognizes the requests made by the driver, as expressed by actuating the lever, wherein said system further includes a control device for causing first gear to be engaged automatically when:
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a control lever is in the rest position; and the system is not in the automatic operating mode; and the gear ratio engaged is a gear that corresponds to a gear higher than first gear; and the engine speed is higher than a threshold; and the speed of the primary shaft of the gearbox is lower than a threshold; and the speed of the differential outlet shaft is lower than a threshold.
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26. A control system for a semi-automatic gearbox, including a lever for controlling gear changes, control means for controlling an automatic operating mode for changing gear ratios in the gearbox, wherein the control means include a control button available to the driver on said lever for initiating an automatic operating mode, and for initiating a change over from automatic mode to manual mode, wherein said system further includes a subassembly comprising means for analyzing the actuation of the lever representing the requests made by the driver and for imposing an automatic operating mode when it no longer recognizes the requests made by the driver, as expressed by actuating the lever, and a clutch control loop comprising:
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an adder which sums firstly a reference Δ
ω
'"'"' equal to the differentiated difference between a reference engine speed and the reference speed of the primary shaft of the gearbox;a calculator module that integrates the signal ouput from the above-mentioned adder to a limit Xref max; an adder which sums the output of the above-mentioned calculator module and the derivative of a signal generated by a sensor associated with the clutch actuator; a calculator module which applies a proportional integral type algorithm to the signal output by the above-mentioned adder, and which generates at its ouput a current i for controlling an electrically driven clutch valve; the electrically driven valve EV; a clutch actuator; a calculator module which calculates the derivative of the signal generated by the sensor associated with the clutch actuator; and a calculator module which calculates the differentiated difference Δ
ω
'"'"' between the engine speed as measured ω
ENG and the primary shaft speed as measured ω
1. - View Dependent Claims (27)
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Specification